Brasso said:I've used Choke brand 00Buck from an 18" 870 with IMP bore and could keep 4 to 5 pellets on a B27 at 50yds. ( 9 pellet reduced recoil ) At 25yds or less I've never seen it stray off the black. It's been a while since I purchased any, but they were selling for $11 per 20rnd box.